NASA
Nasa: Goddard Scientific Visualization Studio
This impressive exhibit of images and videos is available to see how NASA uses technology to track the weather. You can search by keyword for more specific images.
Exploratorium
Exploratorium: Third From the Sun
This site offers a short history of the evolution of the space program and man's quest for more revealing and detailed pictures of the earth.
NASA
Nasa: The Space Place
This site from NASA's Space Place is geared towards early elementary learners. It offers detailed instructions for crafts and activities related to space, games and a teacher resource area. Students can also ask an expert at this site.